15results about How to "Reduce resonance effect" patented technology

The invention provides a piezoelectric self-feedback excitation type miniature electric field sensor, an electric field detection method and a sensor, and is applied to the technical field of electric field sensors. The piezoelectric self-feedback excitation type miniature electric field sensor comprises a substrate used for supporting a vibration pickup reference structure, a piezoelectric driving structure, a mutual shielding electric field sensing structure and an elastic beam; the piezoelectric driving structure is used for enabling the piezoelectric driving structure to deform under the condition that driving voltage is applied to the piezoelectric driving structure so as to enable the elastic beam to generate vibration; the mutual shielding electric field induction structure is used for responding to the vibration of the elastic beam, and the mutual shielding electric field induction structure outputs an induction current signal in a differential form so as to suppress common-mode noise and detect the amplitude intensity of a to-be-detected electric field; and the vibration pickup reference structure is used for responding to the vibration of the elastic beam and outputting a reference current signal so as to adjust the magnitude of the driving voltage and enable the output sensitivity of the piezoelectric self-feedback excitation type miniature electric field sensor to be a preset value.

The invention relates to the technical field of cable manufacturing, in particular to a superconducting coaxial cable for a quantum computer and a manufacturing method thereof, and the method comprises the steps: coating an inner conductor with an inner insulating layer to form an inner conductor layer, and electroplating a niobium compound coating on the inner wall of a stainless steel tube to form an outer conductor; forming a cable conductive layer; acquiring an advancing speed change curve of a single inner conductor layer; determining a first velocity mutation type and a second velocity mutation type; determining the vertical stirring speed of the electroplating stirring rod at the position of the outer conductor; electroplating the inner wall of the stainless steel pipe; according to the friction degree of the inner conductor layer and the outer conductor, determining an inner conductor motion adjusting mode, including adjusting the moving speed of the inner conductor layer in the outer conductor, or determining the initial rotating speed of the inner conductor layer when the outer conductor starts to pull a wire; and performing wire drawing on the sleeved outer conductor to form the cable. According to the invention, the stability of cable assembly is improved.

The present disclosure provides a piezoelectric self-feedback excitation type micro electric field sensor, an electric field detection method and a sensor, and is applied to the technical field of electric field sensors. The piezoelectric self-feedback excitation type micro electric field sensor comprises: a substrate for supporting a vibration pickup reference structure, a piezoelectric driving structure, a mutual shielding electric field sensing structure and an elastic beam; the piezoelectric driving structure is used for deforming the piezoelectric driving structure to make the elastic beam vibrate when a driving voltage is applied to the piezoelectric driving structure; the mutual shielding electric field sensing structure is used for outputting a differential form of a sensing current signal in response to the vibration of the elastic beam, so as to suppress common mode noise and detect the amplitude strength of the electric field to be measured; the vibration pickup reference structure is used for outputting a reference current signal in response to the vibration of the elastic beam, so as to adjust the size of the driving voltage, so that the output sensitivity of the piezoelectric self-feedback excitation type micro electric field sensor is a predetermined value.

The utility model discloses a noise reduction structure for a loudspeaker voice coil, which comprises a voice coil body, a magnetic conductive layer arranged on the outer side of the voice coil body, a second vibration reduction layer arranged on the outer side of the voice coil body and located on the outer side of the magnetic conductive layer, and a protective layer arranged on the outer side of the voice coil body and located on the outer side of the second vibration reduction layer. A first vibration reduction layer is arranged in the voice coil body, a sound insulation plate is arranged on one side of the voice coil body, and the second vibration reduction layer and the first vibration reduction layer are used for reducing the resonance effect of the voice coil body. The utility model aims to solve the problems that the resonance effect can be generated when the voice coil of the loudspeaker vibrates, so that the phenomena of sound distortion and sound quality reduction caused by vibration occur, sound aliasing of different frequencies can be caused, and the definition and the accuracy of audio signals are influenced.

This utility model discloses a stabilizing device for a bagged food filling machine, relating to the field of food filling technology. It includes a workbench, a conveying pipe on the outer surface of the conveying module, and a connecting pipe on the bottom surface of the conveying pipe; a fixing plate on the inner side of the workbench, and a filling mechanism on the outer surface of the fixing plate. This stabilizing device for a bagged food filling machine effectively solves the problem of filling head swaying through its filling mechanism. When filling high-speed flowing or highly viscous jelly, the telescopic rod can be adjusted in length according to actual needs. Combined with the buffering effect of the buffer frame, this greatly reduces the swaying amplitude of the filling head during operation, ensuring filling stability. The mounting base and adjusting components allow for precise adjustment of the position of the vertical heat-sealing block, ensuring accurate positioning of the sealed bag during the filling process. This not only improves the appearance quality of the finished jelly but also avoids raw material waste and effectively reduces production costs.

The invention relates to the technical field of server case equipment, and particularly discloses a network server case for a computer room, which comprises a base, an outer case body is fixedly clamped at the top of the base, a sealing door is rotatably connected to an opening of the outer case body, the network server case further comprises a fixing mechanism, the fixing mechanism is fixedly mounted in the outer case body, and the sealing door is rotatably connected to the opening of the outer case body. The fixing mechanism is used for fixedly installing the server; and the auxiliary mechanism is fixedly installed in the base, and the auxiliary mechanism is used for being matched with the fixing mechanism to work. When the inserting frame and the mounting frame are inserted, the folding plate is in a complete contraction state, and the two sides of the inserting frame are opened, that is, the server is in an open state after the server is mounted, so that heat dissipation of the server in the working process is facilitated, and the service life of the server is greatly prolonged.

The utility model discloses a low noise automobile tire belongs to automobile tire technical field, including tire body, longitudinal pattern groove, drainage pattern groove and first sound absorption pit, tire body tread is equipped with several longitudinal pattern grooves, several drainage pattern grooves are equipped in the tire body's shoulder position, and the first sound absorption pit is equipped on the inner wall of tire body, and several first sound absorption pits are evenly distributed along the circumferential inner wall of tire body. The prior art has solved the problem that the optimization effect is not obvious, the tire weight is increased and the production cost is improved due to the relatively limited space of pattern optimization and form adjustment and the addition of mute material. The utility model solves the three big problems of the noise reduction bottleneck, weight increase and cost increase of the traditional technology through structural innovation, and provides a technical solution with performance and economy for the electric automobile tire.

This invention discloses a low-odor, low-VOC gradient ultrafine polypropylene meltblown sound-absorbing and sound-insulating composite noise reduction material, belonging to the technical field of polymer noise reduction and environmentally friendly materials. This invention uses 1-5μm ultrafine PP meltblown fibers as the core substrate to construct a continuous gradient density sound-absorbing structure, achieving full-frequency sound wave gradient dissipation and attenuation. Modified activated carbon particles are embedded in situ within the meltblown fiber network, enabling efficient adsorption and purification of trace VOCs released from the substrate and environmental odor gases. A three-layer co-extruded barrier film of PE / PA / PE is composited with the outer side of the meltblown substrate to construct a constrained damping sound insulation system, significantly weakening the film resonance effect, improving the sound insulation trough, and greatly enhancing the material's low-frequency sound insulation performance. This effectively solves the industry's technical pain points of traditional PP meltblown noise reduction materials, such as high odor, high VOC content, fragmented sound absorption and insulation functions, narrow effective noise reduction frequency band, and poor composite structure stability. It can be widely applied in high-end noise reduction and environmental protection scenarios such as automotive interiors, building decoration, rail transit, and home appliances.

The application relates to a dynamic precision compensation control method based on an intelligent PCB drilling machine, which comprises the following steps: collecting a dynamic parameter set in real time through a multi-source sensor group installed on a drilling main shaft, the dynamic parameter set comprising displacement deviation caused by main shaft axial deformation, thermal deformation quantity analyzed based on interlayer temperature gradient, and frequency spectrum features reflecting tool-material coupling vibration, dynamically synthesizing a spatial trajectory correction instruction and a motion parameter optimization instruction according to the multi-dimensional compensation vector and current drilling process parameters, wherein the trajectory correction instruction is reconstructed through a B-spline curve to realize real-time interpolation of a path, a motion controller receives the spatial trajectory correction instruction and the motion parameter optimization instruction, at least three compensation iterations are completed in a single drilling cycle, a linear motor and a main shaft motor are driven to execute online precision compensation, and the compensation instruction execution delay is less than 2 ms.

The utility model provides a curtain wall framework and relates to the technical field of building construction, the curtain wall framework comprises a fixing frame and a glass wallboard connecting mechanism, the right side of the fixing frame is provided with the glass wallboard connecting mechanism, and the left side of the fixing frame is provided with a fixing assembly. As the upper end and the lower end of the triangular connecting pile are provided with triangular supports, a certain amount of support can be provided in the stress process of the triangular connecting pile, so that the stress strength is higher, the safety is higher, the stress limiter can provide a certain amount of position limitation for the glass plate under daily conditions, and the service life of the glass plate is prolonged. The depth can be adjusted according to the position requirement of the glass plate, the situation that the glass plate is not in the agreed horizontal plane due to non-uniform walls is avoided, the hydraulic rods can provide a certain damping effect for the glass plate in windy days, and therefore the glass plate can transfer part of hard impact of strong wind, and the resonance effect of the glass plate is reduced.

The utility model provides a torsion damper which comprises a torsion limiting module, and the torsion limiting module comprises a cover plate, a first friction plate, a friction plate, a second friction plate, a pressing plate and a first disc spring which are sequentially arranged in the axial direction. The first disc spring is buckled and connected with the cover plate so as to limit the first friction plate, the friction plate, the second friction plate and the pressing plate in the axial direction; the clamping module comprises a first clamping plate installed on the side of a gearbox and a second clamping plate installed on the side of an engine flywheel, and the first clamping plate and the second clamping plate are connected to the two sides of the friction plate in a fastened mode in the axial direction; the driving disc is clamped between the first clamping plate and the second clamping plate in the axis direction; the internal spline is in transmission connection with the driving disc; and the vibration reduction module is used for connecting the clamping module and the driving disc. According to the torsion damper provided by the utility model, the material cost can be effectively reduced on the premise of normally reducing the torsion vibration.

The utility model discloses a kind of muffler air inlet pipe connecting frame, relate to agricultural machinery technical field.The muffler air inlet pipe connecting frame, including base, the base upper fixedly connected with engine, engine side surface fixedly installed with support frame, support frame is fixedly installed with shell, shell upper and lower sides are fixedly installed with air outlet pipe and air inlet pipe and with shell interior intercommunication, engine side surface is equipped with exhaust port, support frame lower side fixedly connected with pipe support, fixedly installed with rubber pad between pipe support and air inlet pipe;Support frame front end lower side fixedly installed with shock-absorbing rod.The muffler air inlet pipe connecting frame, the shock-absorbing spring of the muffler air inlet pipe connecting frame's connecting support frame installation can effectively attenuate low-frequency vibration generated when engine operates, through elastic deformation absorption vibration energy, reduce the vibration transmission caused by rigid connection, avoid the problem that weld point cracks, component loosening etc.

The utility model discloses an anti-textile machinery same frequency vibration infrastructure, which comprises a plurality of independent anti-resonance structures, a movable connecting plate is connected between the adjacent independent anti-resonance structures, each independent infrastructure comprises a cement block, one or more supporting mechanisms, a first upright post, a second upright post, a third upright post and a fourth upright post, the first stand column, the second stand column, the third stand column and the fourth stand column are fixedly arranged on the cement blocks, buffer layers are arranged around the cement blocks, the supporting mechanism is connected with the first stand column, the second stand column, the third stand column and the fourth stand column, and the movable connecting plate is connected with the supporting mechanism. The supporting plate is fixed to the first cross beam and the second cross beam. According to the anti-textile machinery same-frequency vibration infrastructure, the multi-layer design is adopted, the number of devices is increased to improve the productivity, the multiple independent anti-resonance structures are mutually independent, vibration transmission is avoided, the resonance effect is reduced, and the service life is prolonged.

The utility model discloses an electric forklift connecting rod double-end punching device which comprises a working table, a sliding groove is formed in the rear side of the upper end of the working table, an adjusting assembly is arranged in the sliding groove, and the left side and the right side of the upper end of the adjusting assembly are each fixedly provided with a supporting adjusting plate. A driving motor is fixedly installed at the rear end of the supporting adjusting plate, a drill bit is fixedly installed at the output end of the driving motor, a rod body is placed at the upper end of the supporting table, a third air cylinder is fixedly installed on the front side of the upper end of the base plate, and a stabilizing plate is fixedly installed at the output end of the third air cylinder. And a fixing plate is fixedly mounted on the rear side of the upper end of the base plate. Compared with the prior art, the connecting rod has the advantages that the stabilizing plate is matched with the fixing plate to contact and clamp the middle position of the rod body, so that the load on the connecting rod body can be uniformly dispersed, the stress of the connecting rod body is more uniform, the stress concentration in the middle of the connecting rod can be effectively reduced, and the fracture risk is reduced.

The present invention relates to the technical field of turbochargers, and discloses a turbine box structure for reducing the exciting force of a vortex tongue, comprising a flow channel, an axial hole, a vortex tongue, and a machined contour surface located at the flow channel, wherein the flow channel has an upper cavity surface of a fluid domain and a lower cavity surface of a fluid domain near the axial hole, and one end of a vortex tongue mouth starts from the upper cavity surface of the fluid domain or the lower cavity surface of the fluid domain, and the other end ends at the machined contour surface. The vortex tongue mouth structure is innovatively smoothly transitioned with the upper cavity surface or the lower cavity surface of the fluid domain, and the exciting force generated by the vortex will be greatly reduced when the fluid passes through the tongue mouth, thereby reducing the resonance effect on the turbine blades, thereby improving the high-cycle fatigue strength of the turbine.